Appeal No. 1998-0762
Application No. 08/379,576
comprising 10 to 50% by weight of a crystalline layered
silicate as a builder, 1 to 5% by weight of
tetraacetylethylenediamine (TAED) and 0.5 to 4% by weight of a
bleach, such as sodium perborate and/or sodium percarbonate.
See column 1, lines 47-57 and abstract. There is no dispute
that Dany ‘895 describes the claimed crystalline layered
silicate and bleach (percarbonate) Compare the Answer in its1
entirety with Brief in its entirety. As argued by appellants
at page 7 of the Brief, we recognize “Dany ‘895 [by itself]
provides no teaching or suggestion relating to the use of EDDS
[ethylenediamine-N, N’-disuccinic acid] in [its] disclosed
composition.” However, we find that Painter describes using
various conventional chelants, including TAED and EDDS, in a
dishwashing composition comprising a builder and an oxygen
bleach system. See page 1, lines 6-13, page 8, line 30 to
page 9, line 28. We find that Painter prefers a non-
phosphorous chelant, EDDS, described in U.S. Patent 4,704,233
issued to Hartman et al. since this chelant is “believed to
1According to appellants (Specification, pages 1 and 2),
the claimed crystalline layered silicate and the claimed
sodium percarbonate are also known to be advantageous as a
detergent builder material and a bleach, respectively.
5
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007